Short for 大腿四頭筋 (daitai shitōkin, “quadriceps muscle”).

gymnasium / gymnastics / fitness center

to commute, to go back and forth, to ply between, to attend (school)

to forge, to train

everyday life; daily life

every day; daily

a quadriceps femoris muscle

muscle / tendon / have an aptitude / vein / (usually in place names) road

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend